Revenue Recognition (Narrative) (Details) - USD ($)	3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenue Recognition [line items]
Medicare cap reversal	$ 228,000	$ 228,000	$ 165,000
Percentage of automatic budget reductions						2.00%
Unbilled Revenue	$ 1,900,000	$ 1,900,000
Two Program Projected Measurement Period Liability [Member]
Revenue Recognition [line items]
Additional amount owed for Medicare cap				$ 2,100,000	$ 2,100,000	$ 2,100,000